X-Git-Url: http://git.shiar.nl/barcat.git/blobdiff_plain/1de60201303fff6e0d612658790b4c44eff0c055..ed5e66a9d56a0aa112a81e10af214150a30eb019:/t/examples.t

diff --git a/t/examples.t b/t/examples.t
index 19c1377..0f313ec 100755
--- a/t/examples.t
+++ b/t/examples.t
@@ -1,7 +1,21 @@
 #!/usr/bin/env perl
 use 5.014;
 use warnings;
+use re '/ms';
+use IPC::Run 'run';
+
 use Test::More;
+{ # silence fail diagnostics because of single caller
+	no warnings 'redefine';
+	sub Test::Builder::_ok_debug {}
+}
+
+my %CMDARGS = (
+	ping => '-c 1 ',
+	'cat \Khttpd/' => '/var/log/apache2/',
+	' \K\*(?=\h*\|)' => 'sample/media/*.*',
+	find => 'sample/media -name \*.\* ',
+);
 
 my $filename = 'barcat';
 open my $input, '<', $filename
@@ -9,12 +23,86 @@ open my $input, '<', $filename
 
 local $/ = "\n\n";
 while (readline $input) {
+SKIP: {
+	# find scriptlets in the appropriate section
 	/^=head1 EXAMPLES/ ... /^=head1/ or next;
-	/^\h/ or next;
+	/^\h/ or next;  # indented code snippet
+	/\A\h*>/ and next;  # psql prompt
 	chomp;
+	my $cmd = $_;
+	my $ref = "$filename line $.";
+
+	# store curl downloads
+	$cmd =~ s{\bcurl (\S*)([^|]*)}{
+		my ($url, $params) = ($1, $2);
+		my $cache = 'sample/data/';
+		-w $cache or skip($url, 2);
+		my $ext = (
+			$cmd =~ /\bxml/     ? 'xml'  :
+			$cmd =~ / jq /      ? 'json' :
+			$cmd =~ /[=.]csv\b/ ? 'csv'  :
+			                      'txt'
+		);
+		my ($domain, $path) = $url =~ m{//([^/]+) .*/ ([^/]*) \z}x;
+		$path =~ s/\.$ext\z//;
+		$cache .= join '.', $path =~ tr/./_/r, $domain, $ext;
+		my $cached = -e $cache;
+		SKIP: {
+			# download to file
+			skip($url, 1) if $cached;
+			$cached = defined runres("curl -sSf $url$params -o $cache");
+			ok($cached, $url) or diag("download at $ref: $@");
+		}
+		$cached or skip($url, 1);
+		"cat $cache"
+	}e;
+
+	# compose an identifier from significant parts
+	do {
+		s/^\h+//;             # indentation
+		s/\\\n\s*//g;         # line continuations
+		s/^[(\h]+//;          # subshell
+		s/^echo\ .*?\|\s*//;  # preceding input
+		s/'(\S+)[^']*'/$1/g;  # quoted arguments
+		s/\h*\|.*//;          # subsequent pipes
+		s/^cat\ (?:\S+\/)?//; # local file
+	} for my $name = $cmd;
+
+	# prepare shell command to execute
+	while (my ($subcmd, $args) = each %CMDARGS) {
+		$subcmd .= " \\K" unless $subcmd =~ m/\\K/;
+		$cmd =~ s/$subcmd/$args/;
+	}
+
+	for my $param ($cmd =~ m{^[(\h]* (\w\S*)}gx) {
+		$param eq 'cat' or
+		runres(['which', $param])
+			or diag("dependency $param missing at $ref\n$cmd"), skip($name, 1);
+	}
+
+	# run and report unexpected results
+	my $output = runres($cmd);
+	ok(!!$output, $name)
+		or diag("command at $ref\n$cmd\n" . ($@ || 'empty output'));
+	defined $output or next;
+
+	# record output for review
+	my $numprefix = sprintf '%02d', Test::More->builder->current_test;
+	if (open my $record, '>', "sample/out/t$numprefix-$name.txt") {
+		print {$record} $output;
+	}
+}}
 
-	my ($name) = /[\h(]*([^|]+)/;
-	ok(qx($_), $name);
+sub runres {
+	my ($cmd) = @_;
+	ref $cmd eq 'ARRAY'
+		or $cmd = [bash => -c => "set -o pipefail\n$cmd"];
+	eval {
+		run($cmd, \undef, \my $output, \my $error);
+		die("error message:\n".($error =~ s/^/    /gr)."\n") if $error;
+		$? == 0 or die "exit status ", $? >> 8, "\n";
+		return $output;
+	};
 }
 
 done_testing();